Fixes for CM-handle de-registration test script

- Fixed dmi-plugin-stub port
- Removed unneeded test cases
- Added pushd/popd so script can be run from any directory
- Added metrics-reports to .gitignore

Issue-ID: CPS-1552
Signed-off-by: danielhanrahan <daniel.hanrahan@est.tech>
Change-Id: I0ff3549449687a919faf1c2f3172fbea6178a658
3 files changed